Analytical E1 strength functions of two-neutron halo nuclei: 11Li and 14Be Original Research Article

An analytical model, recently developed to study the electromagnetic dissociation (EMD) energy spectra of two-neutron halo nuclei, is applied to 11Li and 14Be. We find that a reliable set of experimental data on EMD could help to resolve the problem concerning the structure of the 11Li ground state. For 14Be we find a mutual inconsistency between the existing experimental data on the binding energy, radius and EMD energy spectrum. We also conclude that the structure of 14Be is essentially more complicated than the structure of other Borromean two-neutron halo nuclei.